Television – Bandwidth reduction system – Data rate reduction
Patent
1995-06-15
1997-08-12
Au, Amelia
Television
Bandwidth reduction system
Data rate reduction
348699, H04N 736
Patent
active
056570872
ABSTRACT:
A motion compensating encoding apparatus responsive to a motion amount adaptively generates motion-compensated pixel values for performing differential pulse code modulation of pixel values of image even when the amount of motion compensation required motion-compensated with respect to a reference image is beyond a predetermined motion amount. The motion compensation encoding apparatus includes a global motion estimator for generating a global motion vector representing a spatial position difference between the reference image according to first pixel values stored in a first memory and the current image according to second pixel values stored in a second memory, motion-compensating the reference image on the basis of the generated global motion vector and storing the pixel values of the motion-compensated reference image, a local motion estimator for generating a local motion vector according to comparison of the pixel values between a current video block, which is formed from the second pixel values and which has a size smaller than the current image and a search area formed by part of the pixel values stored in the global motion estimator, a motion compensator for receiving the local motion vector from the local motion estimator and generating motion-compensated pixel values by using the pixel values stored in the global motion estimator and the local motion vector, and a unit for generating a difference value between the respective pixel values of each image secondly output from the second memory and the corresponding motion-compensated pixel values output from the motion compensator. A non-intracoding method is also described.
REFERENCES:
patent: 5006929 (1991-04-01), Barbero et al.
patent: 5280530 (1994-01-01), Trew et al.
patent: 5473379 (1995-12-01), Horne
Jeong Jechang
Kim Sung-tae
Au Amelia
Samsung Electronics Co,. Ltd.
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